Ch 3.1 The Immune System
Four Ways to Transmit Infectious Diseases
1. Dirsct Contact - ex. Shaking hands or sharing drinks with a person
2. Indirect Contact - ex. Being near an infected person who sneezes without covering their mouth.
3. Water and Food - ex. eating foods that are infected with salmonella bacteria.
4. Animal Bites - Being bitten by an animal carrying rabies.
Vocab
- Pathogen - An organism or substance that can cause a disease.
- Antibodies - Particles created by the immune system to destroy disease-causing invaders.
- Antigen - A substance that the body doesn't recognize; usually non-living particles.
- Immune System - Defends the body against infections and disease-causing substances.
- White blood cells - Blood cells that fight infection and help prevent the growth of Cancer
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